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North Wales Narrow Gauge “Moel Tryfan” and “Snowdon Ranger”
The North Wales Narrow Gauge Railways, which opened in 1877, were built to the unusual one foot 11 1/2 inch gauge . Their first two locomotives were two Single Fairlies, that is, with a power bogie and a trailing bogi...
General
| Property | North Wales Narrow Gauge “Moel Tryfan” and “Snowdon Ranger”Remove |
|---|---|
| Built | 1875 |
| Manufacturers | Vulcan |
| Wheel arrangement | 0-6-4T (Single Fairlie) |
| Gauge | 597 mm |
Dimensions and weights
| Property | North Wales Narrow Gauge “Moel Tryfan” and “Snowdon Ranger”Remove |
|---|---|
| Wheelbase | 4.56 m |
| Rigid wheelbase | 1.07 m |
| Service weight | 14.7 t |
| Adhesive weight | 10.7 t |
| Water capacity | 1,635 l |
| Fuel capacity | 0.6 t (coal) |
Boiler
| Property | North Wales Narrow Gauge “Moel Tryfan” and “Snowdon Ranger”Remove |
|---|---|
| Grate area | 0.557 m² |
| Firebox surface | 3.484 m² |
| Tube heating surface | 30.147 m² |
| Evaporative heating surface | 33.631 m² |
| Total heating surface | 33.6 m² |
Power plant
| Property | North Wales Narrow Gauge “Moel Tryfan” and “Snowdon Ranger”Remove |
|---|---|
| Driver diameter | 762 mm |
| Boiler pressure | 9.7 bar |
| Expansion type | simple expansion |
| Cylinders | two, 216 x 356 mm |
Power
| Property | North Wales Narrow Gauge “Moel Tryfan” and “Snowdon Ranger”Remove |
|---|---|
| Power source | steam |
| Estimated power | 75 kW (102 PS) |
| Starting effort | 17.8 kN |
Calculated values
| Property | North Wales Narrow Gauge “Moel Tryfan” and “Snowdon Ranger”Remove |
|---|---|
| Factor of adhesion | 1 : 5.86 |
| Optimal speed | 26 km/h |
| Power-to-weight ratio | 5.1 kW/t |
| Heating Surface Equivalent | 51.1 m² |
| Cylinder volume/HSE | 1 : 510.01 |
| Adhesive weight/Total | 1 : 1.38 |
| Tractive force/Heating surface | 1 : 11.08 |
| Grate area/Heating surface | 1 : 60.38 |
| Firebox/Tube surface | 1 : 8.65 |
